qdev-monitor.c

   1 /*
   2  *  Dynamic device configuration and creation.
   3  *
   4  *  Copyright (c) 2009 CodeSourcery
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "hw/qdev.h"
  21 #include "hw/sysbus.h"
  22 #include "monitor/monitor.h"
  23 #include "monitor/qdev.h"
  24 #include "qmp-commands.h"
  25 #include "sysemu/arch_init.h"
  26 #include "qemu/config-file.h"
  27
  28 /*
  29  * Aliases were a bad idea from the start.  Let's keep them
  30  * from spreading further.
  31  */
  32 typedef struct QDevAlias
  33 {
  34     const char *typename;
  35     const char *alias;
  36     uint32_t arch_mask;
  37 } QDevAlias;
  38
  39 static const QDevAlias qdev_alias_table[] = {
  40     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  41     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  42     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  43     { "virtio-balloon-pci", "virtio-balloon",
  44             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  45     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  46     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  47     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  48     { "lsi53c895a", "lsi" },
  49     { "ich9-ahci", "ahci" },
  50     { "kvm-pci-assign", "pci-assign" },
  51     { }
  52 };
  53
  54 static const char *qdev_class_get_alias(DeviceClass *dc)
  55 {
  56     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  57     int i;
  58
  59     for (i = 0; qdev_alias_table[i].typename; i++) {
  60         if (qdev_alias_table[i].arch_mask &&
  61             !(qdev_alias_table[i].arch_mask & arch_type)) {
  62             continue;
  63         }
  64
  65         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  66             return qdev_alias_table[i].alias;
  67         }
  68     }
  69
  70     return NULL;
  71 }
  72
  73 static bool qdev_class_has_alias(DeviceClass *dc)
  74 {
  75     return (qdev_class_get_alias(dc) != NULL);
  76 }
  77
  78 static void qdev_print_devinfo(DeviceClass *dc)
  79 {
  80     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
  81     if (dc->bus_type) {
  82         error_printf(", bus %s", dc->bus_type);
  83     }
  84     if (qdev_class_has_alias(dc)) {
  85         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  86     }
  87     if (dc->desc) {
  88         error_printf(", desc \"%s\"", dc->desc);
  89     }
  90     if (dc->cannot_instantiate_with_device_add_yet) {
  91         error_printf(", no-user");
  92     }
  93     error_printf("\n");
  94 }
  95
  96 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
  97 {
  98     return strcasecmp(object_class_get_name((ObjectClass *)a),
  99                       object_class_get_name((ObjectClass *)b));
 100 }
 101
 102 static void qdev_print_devinfos(bool show_no_user)
 103 {
 104     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 105         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 106         [DEVICE_CATEGORY_USB]     = "USB",
 107         [DEVICE_CATEGORY_STORAGE] = "Storage",
 108         [DEVICE_CATEGORY_NETWORK] = "Network",
 109         [DEVICE_CATEGORY_INPUT]   = "Input",
 110         [DEVICE_CATEGORY_DISPLAY] = "Display",
 111         [DEVICE_CATEGORY_SOUND]   = "Sound",
 112         [DEVICE_CATEGORY_MISC]    = "Misc",
 113         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 114     };
 115     GSList *list, *elt;
 116     int i;
 117     bool cat_printed;
 118
 119     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 120                         devinfo_cmp);
 121
 122     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 123         cat_printed = false;
 124         for (elt = list; elt; elt = elt->next) {
 125             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 126                                                  TYPE_DEVICE);
 127             if ((i < DEVICE_CATEGORY_MAX
 128                  ? !test_bit(i, dc->categories)
 129                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 130                 || (!show_no_user
 131                     && dc->cannot_instantiate_with_device_add_yet)) {
 132                 continue;
 133             }
 134             if (!cat_printed) {
 135                 error_printf("%s%s devices:\n", i ? "\n" : "",
 136                              cat_name[i]);
 137                 cat_printed = true;
 138             }
 139             qdev_print_devinfo(dc);
 140         }
 141     }
 142
 143     g_slist_free(list);
 144 }
 145
 146 static int set_property(void *opaque, const char *name, const char *value,
 147                         Error **errp)
 148 {
 149     Object *obj = opaque;
 150     Error *err = NULL;
 151
 152     if (strcmp(name, "driver") == 0)
 153         return 0;
 154     if (strcmp(name, "bus") == 0)
 155         return 0;
 156
 157     object_property_parse(obj, value, name, &err);
 158     if (err != NULL) {
 159         qerror_report_err(err);
 160         error_free(err);
 161         return -1;
 162     }
 163     return 0;
 164 }
 165
 166 static const char *find_typename_by_alias(const char *alias)
 167 {
 168     int i;
 169
 170     for (i = 0; qdev_alias_table[i].alias; i++) {
 171         if (qdev_alias_table[i].arch_mask &&
 172             !(qdev_alias_table[i].arch_mask & arch_type)) {
 173             continue;
 174         }
 175
 176         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 177             return qdev_alias_table[i].typename;
 178         }
 179     }
 180
 181     return NULL;
 182 }
 183
 184 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 185 {
 186     ObjectClass *oc;
 187     DeviceClass *dc;
 188
 189     oc = object_class_by_name(*driver);
 190     if (!oc) {
 191         const char *typename = find_typename_by_alias(*driver);
 192
 193         if (typename) {
 194             *driver = typename;
 195             oc = object_class_by_name(*driver);
 196         }
 197     }
 198
 199     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 200         error_setg(errp, "'%s' is not a valid device model name", *driver);
 201         return NULL;
 202     }
 203
 204     if (object_class_is_abstract(oc)) {
 205         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 206                   "non-abstract device type");
 207         return NULL;
 208     }
 209
 210     dc = DEVICE_CLASS(oc);
 211     if (dc->cannot_instantiate_with_device_add_yet ||
 212         (qdev_hotplug && !dc->hotpluggable)) {
 213         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 214                   "pluggable device type");
 215         return NULL;
 216     }
 217
 218     return dc;
 219 }
 220
 221
 222 int qdev_device_help(QemuOpts *opts)
 223 {
 224     Error *local_err = NULL;
 225     const char *driver;
 226     DevicePropertyInfoList *prop_list;
 227     DevicePropertyInfoList *prop;
 228
 229     driver = qemu_opt_get(opts, "driver");
 230     if (driver && is_help_option(driver)) {
 231         qdev_print_devinfos(false);
 232         return 1;
 233     }
 234
 235     if (!driver || !qemu_opt_has_help_opt(opts)) {
 236         return 0;
 237     }
 238
 239     qdev_get_device_class(&driver, &local_err);
 240     if (local_err) {
 241         goto error;
 242     }
 243
 244     prop_list = qmp_device_list_properties(driver, &local_err);
 245     if (local_err) {
 246         goto error;
 247     }
 248
 249     for (prop = prop_list; prop; prop = prop->next) {
 250         error_printf("%s.%s=%s", driver,
 251                      prop->value->name,
 252                      prop->value->type);
 253         if (prop->value->has_description) {
 254             error_printf(" (%s)\n", prop->value->description);
 255         } else {
 256             error_printf("\n");
 257         }
 258     }
 259
 260     qapi_free_DevicePropertyInfoList(prop_list);
 261     return 1;
 262
 263 error:
 264     error_printf("%s\n", error_get_pretty(local_err));
 265     error_free(local_err);
 266     return 1;
 267 }
 268
 269 static Object *qdev_get_peripheral(void)
 270 {
 271     static Object *dev;
 272
 273     if (dev == NULL) {
 274         dev = container_get(qdev_get_machine(), "/peripheral");
 275     }
 276
 277     return dev;
 278 }
 279
 280 static Object *qdev_get_peripheral_anon(void)
 281 {
 282     static Object *dev;
 283
 284     if (dev == NULL) {
 285         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 286     }
 287
 288     return dev;
 289 }
 290
 291 static void qbus_list_bus(DeviceState *dev)
 292 {
 293     BusState *child;
 294     const char *sep = " ";
 295
 296     error_printf("child busses at \"%s\":",
 297                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 298     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 299         error_printf("%s\"%s\"", sep, child->name);
 300         sep = ", ";
 301     }
 302     error_printf("\n");
 303 }
 304
 305 static void qbus_list_dev(BusState *bus)
 306 {
 307     BusChild *kid;
 308     const char *sep = " ";
 309
 310     error_printf("devices at \"%s\":", bus->name);
 311     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 312         DeviceState *dev = kid->child;
 313         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 314         if (dev->id)
 315             error_printf("/\"%s\"", dev->id);
 316         sep = ", ";
 317     }
 318     error_printf("\n");
 319 }
 320
 321 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 322 {
 323     BusState *child;
 324
 325     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 326         if (strcmp(child->name, elem) == 0) {
 327             return child;
 328         }
 329     }
 330     return NULL;
 331 }
 332
 333 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 334 {
 335     BusChild *kid;
 336
 337     /*
 338      * try to match in order:
 339      *   (1) instance id, if present
 340      *   (2) driver name
 341      *   (3) driver alias, if present
 342      */
 343     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 344         DeviceState *dev = kid->child;
 345         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 346             return dev;
 347         }
 348     }
 349     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 350         DeviceState *dev = kid->child;
 351         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 352             return dev;
 353         }
 354     }
 355     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 356         DeviceState *dev = kid->child;
 357         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 358
 359         if (qdev_class_has_alias(dc) &&
 360             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 361             return dev;
 362         }
 363     }
 364     return NULL;
 365 }
 366
 367 static inline bool qbus_is_full(BusState *bus)
 368 {
 369     BusClass *bus_class = BUS_GET_CLASS(bus);
 370     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 371 }
 372
 373 /*
 374  * Search the tree rooted at @bus for a bus.
 375  * If @name, search for a bus with that name.  Note that bus names
 376  * need not be unique.  Yes, that's screwed up.
 377  * Else search for a bus that is a subtype of @bus_typename.
 378  * If more than one exists, prefer one that can take another device.
 379  * Return the bus if found, else %NULL.
 380  */
 381 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 382                                      const char *bus_typename)
 383 {
 384     BusChild *kid;
 385     BusState *pick, *child, *ret;
 386     bool match;
 387
 388     assert(name || bus_typename);
 389     if (name) {
 390         match = !strcmp(bus->name, name);
 391     } else {
 392         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 393     }
 394
 395     if (match && !qbus_is_full(bus)) {
 396         return bus;             /* root matches and isn't full */
 397     }
 398
 399     pick = match ? bus : NULL;
 400
 401     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 402         DeviceState *dev = kid->child;
 403         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 404             ret = qbus_find_recursive(child, name, bus_typename);
 405             if (ret && !qbus_is_full(ret)) {
 406                 return ret;     /* a descendant matches and isn't full */
 407             }
 408             if (ret && !pick) {
 409                 pick = ret;
 410             }
 411         }
 412     }
 413
 414     /* root or a descendant matches, but is full */
 415     return pick;
 416 }
 417
 418 static BusState *qbus_find(const char *path)
 419 {
 420     DeviceState *dev;
 421     BusState *bus;
 422     char elem[128];
 423     int pos, len;
 424
 425     /* find start element */
 426     if (path[0] == '/') {
 427         bus = sysbus_get_default();
 428         pos = 0;
 429     } else {
 430         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 431             assert(!path[0]);
 432             elem[0] = len = 0;
 433         }
 434         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 435         if (!bus) {
 436             qerror_report(QERR_BUS_NOT_FOUND, elem);
 437             return NULL;
 438         } else if (qbus_is_full(bus)) {
 439             qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
 440                           elem);
 441             return NULL;
 442         }
 443         pos = len;
 444     }
 445
 446     for (;;) {
 447         assert(path[pos] == '/' || !path[pos]);
 448         while (path[pos] == '/') {
 449             pos++;
 450         }
 451         if (path[pos] == '\0') {
 452             return bus;
 453         }
 454
 455         /* find device */
 456         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 457             g_assert_not_reached();
 458             elem[0] = len = 0;
 459         }
 460         pos += len;
 461         dev = qbus_find_dev(bus, elem);
 462         if (!dev) {
 463             qerror_report(QERR_DEVICE_NOT_FOUND, elem);
 464             if (!monitor_cur_is_qmp()) {
 465                 qbus_list_dev(bus);
 466             }
 467             return NULL;
 468         }
 469
 470         assert(path[pos] == '/' || !path[pos]);
 471         while (path[pos] == '/') {
 472             pos++;
 473         }
 474         if (path[pos] == '\0') {
 475             /* last specified element is a device.  If it has exactly
 476              * one child bus accept it nevertheless */
 477             switch (dev->num_child_bus) {
 478             case 0:
 479                 qerror_report(ERROR_CLASS_GENERIC_ERROR,
 480                               "Device '%s' has no child bus", elem);
 481                 return NULL;
 482             case 1:
 483                 return QLIST_FIRST(&dev->child_bus);
 484             default:
 485                 qerror_report(ERROR_CLASS_GENERIC_ERROR,
 486                               "Device '%s' has multiple child busses", elem);
 487                 if (!monitor_cur_is_qmp()) {
 488                     qbus_list_bus(dev);
 489                 }
 490                 return NULL;
 491             }
 492         }
 493
 494         /* find bus */
 495         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 496             g_assert_not_reached();
 497             elem[0] = len = 0;
 498         }
 499         pos += len;
 500         bus = qbus_find_bus(dev, elem);
 501         if (!bus) {
 502             qerror_report(QERR_BUS_NOT_FOUND, elem);
 503             if (!monitor_cur_is_qmp()) {
 504                 qbus_list_bus(dev);
 505             }
 506             return NULL;
 507         }
 508     }
 509 }
 510
 511 DeviceState *qdev_device_add(QemuOpts *opts)
 512 {
 513     DeviceClass *dc;
 514     const char *driver, *path, *id;
 515     DeviceState *dev;
 516     BusState *bus = NULL;
 517     Error *err = NULL;
 518
 519     driver = qemu_opt_get(opts, "driver");
 520     if (!driver) {
 521         qerror_report(QERR_MISSING_PARAMETER, "driver");
 522         return NULL;
 523     }
 524
 525     /* find driver */
 526     dc = qdev_get_device_class(&driver, &err);
 527     if (err) {
 528         qerror_report_err(err);
 529         error_free(err);
 530         return NULL;
 531     }
 532
 533     /* find bus */
 534     path = qemu_opt_get(opts, "bus");
 535     if (path != NULL) {
 536         bus = qbus_find(path);
 537         if (!bus) {
 538             return NULL;
 539         }
 540         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 541             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 542                           "Device '%s' can't go on a %s bus",
 543                           driver, object_get_typename(OBJECT(bus)));
 544             return NULL;
 545         }
 546     } else if (dc->bus_type != NULL) {
 547         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 548         if (!bus || qbus_is_full(bus)) {
 549             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 550                           "No '%s' bus found for device '%s'",
 551                           dc->bus_type, driver);
 552             return NULL;
 553         }
 554     }
 555     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 556         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 557         return NULL;
 558     }
 559
 560     /* create device */
 561     dev = DEVICE(object_new(driver));
 562
 563     if (bus) {
 564         qdev_set_parent_bus(dev, bus);
 565     }
 566
 567     id = qemu_opts_id(opts);
 568     if (id) {
 569         dev->id = id;
 570     }
 571
 572     if (dev->id) {
 573         object_property_add_child(qdev_get_peripheral(), dev->id,
 574                                   OBJECT(dev), NULL);
 575     } else {
 576         static int anon_count;
 577         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 578         object_property_add_child(qdev_get_peripheral_anon(), name,
 579                                   OBJECT(dev), NULL);
 580         g_free(name);
 581     }
 582
 583     /* set properties */
 584     if (qemu_opt_foreach(opts, set_property, dev, NULL)) {
 585         object_unparent(OBJECT(dev));
 586         object_unref(OBJECT(dev));
 587         return NULL;
 588     }
 589
 590     dev->opts = opts;
 591     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 592     if (err != NULL) {
 593         qerror_report_err(err);
 594         error_free(err);
 595         dev->opts = NULL;
 596         object_unparent(OBJECT(dev));
 597         object_unref(OBJECT(dev));
 598         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 599         return NULL;
 600     }
 601     return dev;
 602 }
 603
 604
 605 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 606 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 607
 608 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 609                              int indent)
 610 {
 611     if (!props)
 612         return;
 613     for (; props->name; props++) {
 614         Error *err = NULL;
 615         char *value;
 616         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 617         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 618             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 619         } else {
 620             value = object_property_print(OBJECT(dev), props->name, true, &err);
 621         }
 622         g_free(legacy_name);
 623
 624         if (err) {
 625             error_free(err);
 626             continue;
 627         }
 628         qdev_printf("%s = %s\n", props->name,
 629                     value && *value ? value : "<null>");
 630         g_free(value);
 631     }
 632 }
 633
 634 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 635 {
 636     BusClass *bc = BUS_GET_CLASS(bus);
 637
 638     if (bc->print_dev) {
 639         bc->print_dev(mon, dev, indent);
 640     }
 641 }
 642
 643 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 644 {
 645     ObjectClass *class;
 646     BusState *child;
 647     NamedGPIOList *ngl;
 648
 649     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 650                 dev->id ? dev->id : "");
 651     indent += 2;
 652     QLIST_FOREACH(ngl, &dev->gpios, node) {
 653         if (ngl->num_in) {
 654             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 655                         ngl->num_in);
 656         }
 657         if (ngl->num_out) {
 658             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 659                         ngl->num_out);
 660         }
 661     }
 662     class = object_get_class(OBJECT(dev));
 663     do {
 664         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 665         class = object_class_get_parent(class);
 666     } while (class != object_class_by_name(TYPE_DEVICE));
 667     bus_print_dev(dev->parent_bus, mon, dev, indent);
 668     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 669         qbus_print(mon, child, indent);
 670     }
 671 }
 672
 673 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 674 {
 675     BusChild *kid;
 676
 677     qdev_printf("bus: %s\n", bus->name);
 678     indent += 2;
 679     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 680     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 681         DeviceState *dev = kid->child;
 682         qdev_print(mon, dev, indent);
 683     }
 684 }
 685 #undef qdev_printf
 686
 687 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 688 {
 689     if (sysbus_get_default())
 690         qbus_print(mon, sysbus_get_default(), 0);
 691 }
 692
 693 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 694 {
 695     qdev_print_devinfos(true);
 696 }
 697
 698 typedef struct QOMCompositionState {
 699     Monitor *mon;
 700     int indent;
 701 } QOMCompositionState;
 702
 703 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 704
 705 static int print_qom_composition_child(Object *obj, void *opaque)
 706 {
 707     QOMCompositionState *s = opaque;
 708
 709     print_qom_composition(s->mon, obj, s->indent);
 710
 711     return 0;
 712 }
 713
 714 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 715 {
 716     QOMCompositionState s = {
 717         .mon = mon,
 718         .indent = indent + 2,
 719     };
 720     char *name;
 721
 722     if (obj == object_get_root()) {
 723         name = g_strdup("");
 724     } else {
 725         name = object_get_canonical_path_component(obj);
 726     }
 727     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 728                    object_get_typename(obj));
 729     g_free(name);
 730     object_child_foreach(obj, print_qom_composition_child, &s);
 731 }
 732
 733 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 734 {
 735     const char *path = qdict_get_try_str(dict, "path");
 736     Object *obj;
 737     bool ambiguous = false;
 738
 739     if (path) {
 740         obj = object_resolve_path(path, &ambiguous);
 741         if (!obj) {
 742             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 743             return;
 744         }
 745         if (ambiguous) {
 746             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 747             return;
 748         }
 749     } else {
 750         obj = qdev_get_machine();
 751     }
 752     print_qom_composition(mon, obj, 0);
 753 }
 754
 755 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 756 {
 757     Error *local_err = NULL;
 758     QemuOpts *opts;
 759     DeviceState *dev;
 760
 761     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 762     if (local_err) {
 763         qerror_report_err(local_err);
 764         error_free(local_err);
 765         return -1;
 766     }
 767     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 768         qemu_opts_del(opts);
 769         return 0;
 770     }
 771     dev = qdev_device_add(opts);
 772     if (!dev) {
 773         qemu_opts_del(opts);
 774         return -1;
 775     }
 776     object_unref(OBJECT(dev));
 777     return 0;
 778 }
 779
 780 void qmp_device_del(const char *id, Error **errp)
 781 {
 782     Object *obj;
 783     char *root_path = object_get_canonical_path(qdev_get_peripheral());
 784     char *path = g_strdup_printf("%s/%s", root_path, id);
 785
 786     g_free(root_path);
 787     obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 788     g_free(path);
 789
 790     if (!obj) {
 791         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 792         return;
 793     }
 794
 795     qdev_unplug(DEVICE(obj), errp);
 796 }
 797
 798 void qdev_machine_init(void)
 799 {
 800     qdev_get_peripheral_anon();
 801     qdev_get_peripheral();
 802 }
 803
 804 QemuOptsList qemu_device_opts = {
 805     .name = "device",
 806     .implied_opt_name = "driver",
 807     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 808     .desc = {
 809         /*
 810          * no elements => accept any
 811          * sanity checking will happen later
 812          * when setting device properties
 813          */
 814         { /* end of list */ }
 815     },
 816 };
 817
 818 QemuOptsList qemu_global_opts = {
 819     .name = "global",
 820     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 821     .desc = {
 822         {
 823             .name = "driver",
 824             .type = QEMU_OPT_STRING,
 825         },{
 826             .name = "property",
 827             .type = QEMU_OPT_STRING,
 828         },{
 829             .name = "value",
 830             .type = QEMU_OPT_STRING,
 831         },
 832         { /* end of list */ }
 833     },
 834 };
 835
 836 int qemu_global_option(const char *str)
 837 {
 838     char driver[64], property[64];
 839     QemuOpts *opts;
 840     int rc, offset;
 841
 842     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 843     if (rc == 2 && str[offset] == '=') {
 844         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 845         qemu_opt_set(opts, "driver", driver, &error_abort);
 846         qemu_opt_set(opts, "property", property, &error_abort);
 847         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 848         return 0;
 849     }
 850
 851     opts = qemu_opts_parse(&qemu_global_opts, str, false);
 852     if (!opts) {
 853         return -1;
 854     }
 855
 856     return 0;
 857 }